JPH07230658A - Disk reproducing device - Google Patents

Abstract

PURPOSE: To miniaturize a disk reproducing device and to smooth disk ejecting operation. CONSTITUTION: The drive unit 20 of the disk reproducing device consists of a chassis 30, a base chassis 40, a holder 50 and a sliding table 60, and guide plates 80 and 80 are provided for the guide axes 51,... of the holder 50. Then the holder 50 which a disk D is charged to is advanced because the guide axes 51,... are pressurized by the hooks 69 and 69 of the slide table 60 and at the time of the moving back of the slide table 60, the holder 50 is pushed up because the guide plates 80 and 80 are pressurized by the hook parts 68 and 68 of the slide table 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus for reproducing a loaded disc or recording the disc.

[0002]

2. Description of the Related Art In recent years, digital recording media such as optical disks and magneto-optical disks have become the mainstream as recording media for recording audio information and the like.

In particular, a compact MD (mini disk) in which information is compressed and recorded on an optical disk or a magneto-optical disk and accommodated in a resin cartridge is highly convenient and is expected to be widely used in the future. By the way.

By the way, along with the development of such recording media, various devices for reproducing the information have been conventionally developed.

For example, an MD player as shown in FIG. 14 is known as a device for reproducing music information recorded on an MD.

This MD player has a holder 1 in which an MD is loaded, a base chassis 2 equipped with an MD optical pickup for reading information of the MD loaded in the holder 1, and a predetermined base chassis 2. A slide table 3 for transferring the holder 1 to a position and a chassis 4 for holding the slide table 3 and the base chassis 2 are provided.

[0007]

[Problems to be Solved by the Invention] However, the M
According to the D player, the guide shaft 5 of the holder 1,
Is largely projected to the outside of the chassis 4, and the tip of the holder is locked by a hook provided on the slide table 3, whereby the holder 1 is horizontally moved and moved upward, which results in an increase in size of the entire apparatus. There are drawbacks.

In addition, the guide grooves 6 ,.
..The guide shafts 5 of holder 1 lowered along
・ Press down with a leaf spring, and then MD
Since the holder 1 loaded with the MD is fixed at a predetermined position of the base chassis 2, the holder 1 is loaded to carry out the MD.
There is a drawback that the motor for moving the slide table 3 back and forth is overloaded when the motor is raised again.

[0009]

According to the present invention, guide grooves are formed on both side surfaces of a base chassis equipped with reproducing means for reproducing a disc, and the disc is loaded and transferred by a slide table. The holder is a disc reproducing apparatus in which a guide shaft supported by the guide groove is projected, and a guide plate movable in the longitudinal direction of the guide groove is provided, and the guide plate is provided with the guide plate. The above object is achieved by providing a disc reproducing apparatus characterized in that an inclined groove through which a shaft penetrates is formed.

Further, by providing the disc reproducing apparatus characterized in that the guide plate is adjacent to the base chassis, and a hook portion for pressing the front end of the guide plate is provided on the slide table in a protruding manner. To achieve.

Further, the above object is achieved by providing a disk reproducing apparatus in which the guide plate and the guide shaft are connected to each other through an elastic member.

[0012]

According to the disc reproducing apparatus of the present invention, when the holder carried along with the slide table descends along the guide groove of the base chassis, the holder gently slides along the inclined groove of the guide plate with which the guide shaft of the holder follows. It will descend to.

At this time, the elastic member connecting the guide plate and the guide shaft works so as to bring the guide shaft into close contact with the inclined groove, thereby facilitating the downward movement of the holder.

On the other hand, when the slide table starts to move backward to carry out the disk, the hook portion projecting therefrom pushes the front end of the guide plate and carries it.

Then, the guide shaft of the holder is pushed up by the inclined groove of the guide plate, and as a result, the holder is separated from the base chassis.

When the slide plate continues to retract, the guide plate is retracted by the slide table and the holder is retracted by the guide shaft being pushed by the inclined groove of the guide plate.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the disc reproducing apparatus of the present invention will be described below. FIG. 1 shows an on-vehicle MD player as the disc reproducing apparatus, and reference numeral 10 in the drawing denotes a housing.

The housing 10 is a rectangular synthetic resin or metal case, and a loading port 12 is opened on the front surface thereof, and an eject switch 14 and a reproduction switch 16 are arranged below the loading port 12. There is.

On the other hand, a drive unit 20 is installed inside the housing 10.
At 0, the disc D inserted in the loading slot 12 is pulled in and reproduced.

The disk D is an MD (mini disk) in which an optical disk d is housed in a resin cartridge e, and a shutter f provided in the cartridge e is opened in the drive unit 20 to expose the optical disk d. By irradiating a part of the laser beam with laser light, the reproduction is performed.

Next, FIG. 2 shows a schematic front view of a drive unit which is the heart of the disc reproducing apparatus.

The drive unit 20 is generally composed of a chassis 30, a base chassis 40, a holder 50, and a slide table 60. The chassis 30 is fixed to the housing via supporting legs 31 ,. Are fixed to the base chassis 40 by guide shafts 51, ..., and the slide table 60 is mounted on the chassis 30 by guide pins 61a, 61b ,.
・ It is mounted so that it can move back and forth through.

The disk D is loaded in the holder 50 as shown by an imaginary line and is transferred to a predetermined position by the holder 50.

Further, the upper ends on both side surfaces of the chassis 30 are bent outwardly, and are formed as the flange portions 32, 32.

Next, FIG. 3 is a schematic plan view of the drive unit, in which reference numerals 70a and 70b denote links.

As clearly shown in this figure, the flange portions 32, 32 of the chassis 30 are formed with linear guide holes 33, 33 in the longitudinal direction thereof.
Both ends of the slide table 60 are attached to 3, 33 so as to be movable back and forth by using the guide pins 61a to 61d as described above.

Further, at one end of the slide table 60,
Long holes 62a, 62b communicating with one guide hole 33 are formed, and the pins 63a, 6 are formed in the long holes 62a, 62b.
3b is penetrated, and one end of a swing arm 64 is attached to one pin 63b thereof.

The swing arm 64 is pivotally attached to the slide table 60 by a pin 63c, one end of which is attached to the pin 63b as described above, and the other end of which is located in a curved hole 62c formed in the slide table 60. It is attached to the pin 63d.

Further, one end of a slide plate 65 indicated by a broken line is attached to the pin 63d, and the slide plate 65 is attached.
The other end is supported by a pin 63e located in a long hole 62d formed in the slide table 60.

On the other hand, the chassis 30 and the slide table 6
0 is linked via links 70a and 70b.

One end of the link 70a is pivotally attached to the flange portion 32 of the chassis 30 by a pin 63f, and the other end thereof is a pin 63g located in an elongated hole 62e formed in the slide table 30.
One end of the other link 70b is pivotally attached to one end of the slide table 30 by a pin 63h, and the other end is supported by a pin 63i located in an elongated hole 35 formed in the arm portion 34 of the chassis 30. .

Next, FIG. 4 shows a front view of the base chassis, and FIG. 5 shows a plan view of the base chassis.

The base chassis 40 is equipped with a turntable 41 and a pickup 42 as reproducing means, and the turntable 41 sucks and rotates an optical disk so that the information recorded by the pickup 42 is sequentially read. ing.

The turntable 41 is provided substantially at the center of the base chassis 40 and is rotated by a motor M1 including a stepping motor.

Further, the pickup 42 is the carriage 4
The carriage 43, which is built in the No. 3 carriage 3, is moved back and forth by a motor M2 such as a stepping motor, thereby performing parallel movement along the disk surface.

That is, the power of the motor M2 is transmitted to the gears 44a-4.
4d to the feed screw 45, and the feed screw 45
Since the rack gear 46 fixed to one end of the carriage 43 is meshed with the carriage 43, the carriage 43 moves back and forth along the support shafts 47, 47 penetrating both ends thereof.

By the way, as is apparent from FIG. 5, the base chassis 40 is supported at three places by the cushions k, ... And is connected to the chassis through the four springs S1 ,. This reduces the impact transmitted to the base chassis 40.

Next, in FIG. 6, the left side surface of the base chassis is
FIG. 7 shows the right side surface of the base chassis.

As is clear from FIGS. 6 and 7, two L-shaped guide grooves 48 are formed on both side surfaces of the base chassis 40 in the longitudinal direction thereof, and the horizontally extending portions are horizontal. A portion 48a is formed, and a portion extending vertically downward from one end of the horizontal portion 48 is formed as a vertical portion 48b.

Below the guide groove 48, the horizontal portion 4
Slits 49 are formed in parallel with 8a.

Further, projecting pieces 40a and 40b are provided at predetermined positions on the upper ends of both side surfaces of the base chassis 40 (see FIG. 5).

Reference numeral F in the drawing denotes a hook, and one end of the spring S1, ... (See FIG. 5) is locked to the hook F.

Next, FIG. 8 is a plan view showing the holder. In the figure, reference numerals 51, ... Show guide shafts, and 80, 80 show guide plates.

As is apparent from this figure, the cylindrical guide shafts 51, ...
The holders 50 are supported by the base chassis by penetrating the guide shafts 51, ... Into the guide grooves of the base chassis (see FIGS. 6 and 7).

Further, guide plates 80, 80 are attached to the guide shafts 51, ... As shown in the drawing, and flange portions 81, 81 projecting from the lower ends of the guide plates 80, 80 are used as bases. Slit 4 of chassis 40
9, 49 (see FIGS. 6 and 7).

On the upper surface of the holder 50, a lever 52, a lock lever 53, and a lock release lever 54 are swingably attached, as shown in the figure.

The lever 52 is a V-shaped metal plate, and the center portion of the lever 52 is located on the upper surface of the holder 50 by the pin P1.
It is pivotally attached at one end and the tension coil spring S
2 is urged toward the opening R, and the other end is swingably supported by a pin P2 located in the curved groove 52a.

Further, projecting pieces 52b and 52c are provided on one end side of the lever 52 in a vertically upward direction, projecting pieces 52d are projecting in a vertically downward direction, and the other end side thereof is horizontally oriented. A projecting piece 52e is provided so as to project.

It should be noted that one end of the tension coil spring S2 has a protruding piece 5
2b, the other end is locked to a projecting piece 50a projecting on the opening R side of the holder 50.

On the other hand, the lock lever 53 is a metal plate having a dogleg shape, the center portion of which is pivotally attached to the upper surface of the holder 50 by a pin P3, and one end of the lever lever 52 is a torsion coil spring S3. Biased in the direction.

Further, projecting pieces 53a and 53b are provided on one end side of the lock lever 53 in a vertically upward direction, and projecting pieces 53c are projectingly provided on the other end side.

The torsion coil spring S3 is fixed to the pin P3, one end of which is the protrusion 53a and the other end of which is the holder 50.
Are respectively engaged with the projecting pieces 50b projecting from the upper surface of the.

On the other hand, the lock release lever 54 includes the protruding piece 54.
It is a metal plate provided with a and 54b, the center part of which is pivotally attached to the upper surface of the holder 50 by a pin P4, and one end side of which is biased toward the lock lever 53 by a tension coil spring S4.

Incidentally, one end of the tension coil spring S4 is locked to a small hole 54c opened at one end of the lock release lever 54, and the other end is locked to a projecting piece 50c projecting from the holder 50.

By the way, when a disk is not loaded in the holder 50, the lever 52 and the lock lever 5
3 and the lock release lever 54 are in the states indicated by the solid lines, and the lever 52 and the lock lever 53 swing to the positions indicated by the imaginary line as the disc is loaded.

That is, when the disc starts to be loaded from the direction of the opening R, the lever 52 swings to the position of the imaginary line by pushing the projection piece 52d (see FIG. 2) at the end face thereof, while the lever 52 moves. The rocking lever 53, whose rocking is restricted, starts rocking to the position shown by the imaginary line, and the rocking lever 53 restricts the rocking of the lever 52.

At the same time, the swing arm 64 and the slide plate 65, the swing of which is restricted by the lock lever 53, are controlled.
(See FIG. 3) is activated, and thus the main motor described later is started.

The discs loaded in the holder 50 have leaf springs S5, S fixed on both side surfaces of the holder 50.
Held by 5.

Next, FIG. 9 shows the right side surface of the drive unit, and FIG. 10 shows the left side surface of the drive unit.

As shown in FIG. 9, the pin 63
A switching lever 66 is fixedly provided at the tips of a and 63b (see FIG. 3), and the switching lever 66 and the guide pin 61c are connected by an elastic member S6 such as a tension coil spring.

Therefore, the switching lever 66 is biased to the right in FIG. 9, and the swing arm 64 is moved to the position shown in FIG.
In the counterclockwise direction, and the slide plate 65 is urged to the left in FIG.

On the other hand, as is clear from FIG. 9, the chassis 3
On the side surface of 0, detectors E and E ', such as microswitches, are fixedly installed, and one of them is a switching lever 6
The main motor described later is stopped when 6 is detected.

Normally, the switching lever 66 is in the position shown in FIG. 9 and is in contact with one of the detectors E.

Therefore, although the main motor is in a stopped state,
When the disc is loaded, as described above (see FIG. 8), the swinging restriction of the swinging arm 64 and the slide plate 65 is released, so that the switching lever 66 is pulled to the right in FIG. 9 by the action of the elastic member S6. As a result, the detector E and the switching lever 66 are brought out of contact with each other, and the main motor is driven until the switching lever 66 comes into contact with the other detector E ′.

Reference numeral M shown in FIG. 10 is the main motor, and the main motor M is fixedly installed on the side surface of the chassis 30 opposite to the detectors E and E ', and its power drives the reduction gear train. It is adapted to be transmitted to the rack 67 via the.

The reduction gear train includes a worm 90, a large gear 91a and a small gear 91b fixed to the drive shaft of the main motor M.
Gears 91 (worm wheel) with gears, large gears 92a
And a gear 93 having a small gear 92b, a gear 93, and a gear 94 (pinion). The worm 90 and the large gear 91a, the small gear 91b and the large gear 92a, and the small gear 92.
b and the gear 93, the gear 93 and the gear 94, and the gear 9
4 and the rack 67 are in mesh with each other.

The rack 67 is the flange portion 3 of the chassis 30.
The guide pins 61b and 61d (see FIG. 3) penetrating 2 are fixedly mounted at the tips of the guide pins 61b and 61d.
It moves forward and backward along the guide holes 33, 33 (see FIG. 3).

By the way, as shown in FIGS. 9 and 10 (or FIG. 2), the slide table 60 has hooks 68, 68 on both sides of the front end in the traveling direction, and hooks 69 on both sides of the rear end. , 69 are respectively provided so as to project vertically downward, and the hooks 69, 69 are guided by the guide shaft 51,
51 is pressed, and when retracted, the hooks 68, 68 press the front end of the guide plate.

Next, FIG. 11 is a front view of the guide plate,
FIG. 12 shows a side view of the guide plate.

As is clear from FIG. 11, the upper and lower ends of the guide plate are bent at right angles in the same direction to form the brim portions 82 and 83, and a part of the lower end is bent to the opposite side. And is referred to as a brim portion 81.

On the other hand, as is clear from FIG.
On the side surface of the guide plate 80, two inclined grooves 84, 84 having an inclination of 30 to 60 degrees, preferably 45 degrees are formed so as to have an upward inclination toward the vertical portion 48b of the guide groove 48. The guide shafts 51, ... pass through the inclined grooves 84, 84.

The guide plate 80 also has a protruding piece 8
5 is projectingly provided, and this projecting piece 85 and one guide shaft 51
Are connected to each other via an elastic member S7 having tensile properties such as a tension coil spring.

Next, FIG. 13 is an enlarged view showing a mounting state of the guide plate, and reference numeral 86 in the drawing denotes a sleeve made of synthetic resin or the like.

As is clear from this figure, the guide plates 80, 80 are adjacent to both sides of the base chassis 40, and in particular the sleeves 86, ... Attached to the guide shafts 51 ,. It is closely attached to the side surface of the chassis 40.

Next, the operation of the disc reproducing apparatus of the present invention will be described. As shown in FIG.
2 is loaded into the holder 50 of the drive unit 20 as shown in FIG.

At this time, the protrusion 52d is formed on the end surface of the disk D.
8, the lever 52 and the lock lever 53 shown in FIG. 8 swing to the positions indicated by the imaginary lines, and at the same time, the swing arm 64 swings counterclockwise in the figure and the slide plate 65 swings left in the figure. To do.

At this time, the switching lever 66 shown in FIG. 9 is not in contact with the detector E, so that the main motor M shown in FIG.

Then, the slide table 60 starts to move forward, and thereafter, when the switching lever 66 shown in FIG. 9 contacts the detector E ', the slide table 60 stops together with the main motor M.

When the slide table 60 is moving forward, the guide shaft 51 moves so that the hooks 69, 69 shown in FIGS.
Since it is pressed by, the holder 50 (not shown in FIGS. 9 and 10) integrated with the guide shaft 51 also moves forward, and
The guide plate 80 shown in FIG. 2 is also pushed by the guide shaft 51 and moves forward.

After that, the guide shaft 51 is attached to the guide groove 4
8 and 48, the guide shaft 51 is inclined by the action of the elastic member S7 at this time.
It comes in close contact with the slope of and slowly descends.

The holder integrated with the guide shaft 51 is pressed downward by the guide plates 80, 80, and as a result, the transferred disk is fixed at a fixed position on the base chassis 40. It will be ready for playback.

When the guide shafts 51, ... Are lowered, the guide plates 80, 80 are attached to the base chassis 40.
Since the downward movement is restricted by the slits 49, 49, the moving is performed only in the horizontal direction.

On the other hand, the eject switch 14 shown in FIG.
When is pressed, the main motor M shown in FIG. 10 reversely rotates, and the slide table 60 starts the backward movement.

Then, the hook portions 68, 68 of the slide table 60 are connected to the front end 8 of the guide plate 80 shown in FIG.
0a, especially the collar portion 82, is pressed and carried.

Then, the guide shaft 51 of the holder is pushed up by the inclined grooves 84, 84 of the guide plate 80, and as a result, the holder is detached from the base chassis 40.

When the slide plate 60 continues to move backward, the guide plate 80 is moved by the slide table 60, and the holder is moved by the inclined groove 84 of the guide plate 80.
When the guide shafts 51, 51 are pushed at 84, the guide shafts 51 move backward, and when the switching lever 66 shown in FIG.

While the holder is retracting, the lock release lever 54 shown in FIG.
And swings in the counterclockwise direction in the figure, and the protruding piece 54a pushes the protruding piece 53c of the lock lever.
3 is swung clockwise in the figure.

Then, the lever 52 becomes the lock lever 5
3 is released from the rocking restriction and returns to the position shown by the solid line.

Therefore, the disc is pushed by the projecting piece 52d and is carried out of the holder 50.
Immediately after the recovery of the lever 52 is started, the protruding piece 52e collides with the protruding piece 40a of the base chassis 40, so that the disc is gently carried out in accordance with the traveling speed of the holder 50.

According to the above-mentioned embodiment, a read-only MD using an optical disk as a disk is shown as a matter of course, but a magneto-optical disk is used as the disk for both reproduction / recording MD and an optical disk. It can also be applied as a reproducing device for a CD (compact disc) or a magnetic tape type.

[0091]

Since the disk reproducing apparatus of the present invention is configured as described above, it has the following effects.

(1) In the disc reproducing apparatus of the present invention, the guide plate which is movable in the longitudinal direction of the guide groove is provided, and the guide plate is provided with the inclined groove through which the guide shaft penetrates. Since the inclined groove can smoothly push up the holder integrated with the guide shaft, an excellent effect that the load on the main motor can be reduced is obtained.

(2) Further, since the guide plate is adjacent to the base chassis and the hook portion for pressing the front end of the guide plate is provided on the slide table so as to project, the guide shaft does not protrude to the outside of the chassis. Since the transfer can be performed, there is an excellent effect that the device can be downsized.

(3) Further, by connecting the guide plate and the guide shaft with the elastic member, the guide shaft comes into close contact with the inclined groove, so that there is an excellent effect that the holder can be moved up and down more smoothly. .

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a disc reproducing apparatus of the present invention.

FIG. 2 is a schematic front view showing an internal mechanism of the disc reproducing apparatus.

FIG. 3 is a schematic plan view showing an internal mechanism of the disc reproducing apparatus.

FIG. 4 is a front view showing a base chassis which constitutes an internal mechanism of the disc reproducing apparatus.

FIG. 5 is a plan view showing a base chassis which constitutes an internal mechanism of the disc reproducing apparatus.

FIG. 6 is a left side view showing a base chassis which constitutes an internal mechanism of the disc reproducing apparatus.

FIG. 7 is a right side view showing a base chassis which constitutes an internal mechanism of the disc reproducing apparatus.

FIG. 8 is a plan view showing a holder that constitutes an internal mechanism of the disc reproducing apparatus.

FIG. 9 is a right side view showing the internal mechanism of the disc reproducing apparatus.

FIG. 10 is a left side view showing an internal mechanism of the disc reproducing apparatus.

FIG. 11 is a front view showing a guide plate as an essential part of the present invention.

FIG. 12 is a side view showing the guide plate.

FIG. 13 is an enlarged view showing a mounting state of the guide plate.

FIG. 14 is a schematic perspective view showing an internal mechanism of a conventional disc reproducing apparatus.

[Explanation of symbols]

 D disk 10 housing 20 drive unit 30 chassis 40 base chassis 48 guide groove 50 holder 51 guide shaft 60 slide table 68 hook part 80 guide plate 84 inclined groove S7 elastic member

Claims (3)

[Claims] 1. A guide groove is formed on both side surfaces of a base chassis equipped with a reproducing means for reproducing a disc,
A disc reproducing apparatus having a guide shaft supported by the guide groove projectingly provided on a holder loaded with the disc and transferred by a slide table, wherein the guide is movable in the longitudinal direction of the guide groove. A disc reproducing apparatus, wherein a plate is provided, and an inclined groove through which the guide shaft penetrates is formed in the guide plate. 2. The disc reproducing apparatus according to claim 1, wherein the guide plate is adjacent to the base chassis, and a hook portion for pressing the front end of the guide plate is provided on the slide table in a protruding manner. 3. The disc reproducing apparatus according to claim 1, wherein the guide plate and the guide shaft are connected to each other via an elastic member having tensile properties.